* @file
* @brief Generic hooks for various libFirm functions.
* @author Michael Beck
- * @version $Id$
*/
#include "config.h"
+#include <assert.h>
+
#include "irhooks.h"
-/* the hooks */
hook_entry_t *hooks[hook_last];
-/* register a hook */
-void register_hook(hook_type_t hook, hook_entry_t *entry) {
+void register_hook(hook_type_t hook, hook_entry_t *entry)
+{
/* check if a hook function is specified. It's a union, so no matter which one */
if (! entry->hook._hook_turn_into_id)
return;
+ /* hook should not be registered yet */
+ assert(entry->next == NULL && hooks[hook] != entry);
+
entry->next = hooks[hook];
hooks[hook] = entry;
}
-/* unregister a hook */
-void unregister_hook(hook_type_t hook, hook_entry_t *entry) {
+void unregister_hook(hook_type_t hook, hook_entry_t *entry)
+{
hook_entry_t *p;
if (hooks[hook] == entry) {
return;
}
- for (p = hooks[hook]; p && p->next != entry; p = p->next);
+ for (p = hooks[hook]; p && p->next != entry; p = p->next) {
+ }
if (p) {
p->next = entry->next;
entry->next = NULL;
}
}
-
-int firm_init_hooks(void) {
- /* this strange code assures that both functions are available
- in a shared library even if none of them is called.
- Meanwhile not needed anymore but ... */
- return (int)register_hook + (int)unregister_hook;
-}